Cigarette case



July 19, 1938. H. G. K|TTREDE E AL 2,124,231

CIGARETTE CASE Filed Feb. 23, 1935 FIG. 3.

immm ITTREDGE,

\ HARVEY c. K

FRANK w. WILLIAMS,

Patented July 19,1938 I UNITED STATES PATENT orricr.

Dayton, Ohio, asslgnors to Foiliilm, Inc., Dayton, Ohio, a corporation of Ohio Application February 23, 1935, Serial No. 7,792 4 Claims. (01. 229-87) Our invention relates to a new article of manufacture for use as a cigarette. package.

It is the object of our invention to provide a cigarette package that is impervious 'to moisture 5 and can be folded and sealed.

It is a further object to provide a cigarette package which has a transparent window so that the condition of the package can be observed.

It is our object to provide a structurally weak,

1o metallic foil reinforced with a transparent metaladhering material that becomes plastic and adhesive under the application of slightpressure and heat. Such a material in a cigarette package makes it possible to eliminate multiple opera- 15 tions in the formation of a package and makes it possible to eliminate the paper wrapping on the inside of tin foil, which is characteristic of the present day cigarette package.

It is our object to provide a single sheet of 2 material of reinforced tin foil and a further object ofproviding such a sheet in which certain areas have no tin foil so as to provide transparent windows through the backing material for the tin foil that is thus left uncovered.

Referring to the drawing, Figure 1 is a vertical section through a, package having one end open and one end sealed, showing the composite structural arrangement of the walls and thepackage.

This section is taken on the line l-l of Figure 2.

30 Figure 2 is an end elevation of the package from the sealed end.

Figure 3 isa section on the line 3-3 of Figure 4. It shows the modification with a transparent window on the side walls of the package.

Figure 4 is an end elevation of the sealed end of the package of Figure 3.

Figure 5 is 'a side elevation of the package of Figure 3.

Referring to the drawing in detail, the package is formed of a structurally weak tin foil designated l to which is integrally joined a metaladhering, syntheticresln material 2. This material is tough, metal-adherent, substantially transparent and has a smooth surface that is 45 non-adherent to any object under ordinary conditions of temperature and pressure.

Upon heat being applied to the tin foil or its structurally strong backing, this backing becomes adhesive, and upon the ends of the pack- 50 age being folded as indicated, this material will adhere to the adjacent metal surface and to it self, forming a tight hermetical seal that keeps the moisture and flavor in the tobacco of the cigarettes.

The metal foil runs in thickness from .0001 to .025 inch. The fol] may be made of any of the standard metals for this purpose.

The structurally strong supporting backing for the metal, may be made of a. variety of synthetic resinous materials provided they have the char- 5 acteristics in the compound of metal-adherence, transparency, a hard, smooth, tough body at or-' dinary temperatures, and the capacity for becoming adhesive upon the application of slight heat and slight pressure.

A- typical compound which we have found satisfactory is the following:

We have found that among the materials that provide for a tough body film are cellulose acetate, cellulose'nitrate, vinyl acetate, vinyl acetate polymerized, vinyl acetate modified with acetaldehyde, and various other equivalent resins'that are normally flexible and hard and tough, but not adherent to metal.

We have found that substances that are adherent to metal, but which are not flexible, hard and tough are such materials as a saturated-alkyd resin. coumeron-indene resin, a phenolic resin shellac, dewaxed shellac, and gum dammar.

' We have. found that materials which are sultable plasticizers are chlorinated diphenyl, triphenyl phosphate, tricresyl phosphate and dibutyl phthalate. Such plasticizers are flexible and control the drying rate.

we find such solvents as toluol and naphtha tobe suitable for purposes of this invention.

We find that the addition of linoleate of lead controls the drying rate, the addition of waxes and stearates controls the tendency of the compound in films to stick to one another, particularly where it is necessary to roll the ,composite foil film, after having been produced'in the interim, before it is utilized in commerce.

. Our invention consists of the combination of a tough body means and adherent means, and a flexible means, such as a polymerizer, together with a suitable solvent. The result is a non-hygroscopic metal and glass adherent film that can be used for the production of strong metal foil products, labels, cigarette packages and other forms of containers.

2.4 grams-ofvinyl acetate, 6 grams of phenolic resin, 2.5 grams of chlorinated diphenyl and 18 cc. of toluol, when appliedat 105 degrees C. for three minutes to metal foil, provide a strong, tough product having a water-white brilliancy and sparkle. The product is strongly adherent to metal and cannot be detached therefrom at room temperatures, and the metal can be attached to glass by the application of heat and slight pressure.

There are a variety of other combinations than indicated but we have found the foregoing to be a satisfactory one-in practice.

The package is provided with a sealed end as indicated in. the several figures of the drawing and it will be noted that this backing for the tin foil, when the folding has taken place at the end of the package, will form a tight seal due to its metal adherent qualities when slightly heated. This is indicated at the sealing surfaces marked 3 and 4.

Referring to Figures 3, 4 and 5, this backing film is left without any foil facing as at 5. As the backing film is substantially transparent and is tough, strong and durable and has a smooth surface, this provides a window through which the cigarettes can be viewed, while at either end there is the metal foil ca-p Suitably sealed. The ends are sealed 'with the combined metal and backing reinforcement while the intermediate side walls are transparent. This backing material is light and flexible so that the total weightof the package is materially reduced from that of the customary package now known in the art.

One of the outstanding features of this package is that the synthetic resin compound is nonhygroscopic. There is, nothing to absorb moisture as in the case of cellulose or natural resin. It is disastrous to a cigarette package to associate with it moisture-absorbing materials. That is the reason for the use of tin foil and that is the disadvantage of, the paper backing of tin foil. The further disadvantage is that with the present day package there is no means of sealing the package against the entrance of moisture or against the loss of moisture from the tobacco.

It will be understood that we desire to comprehend within our invention such modifications as may be necessary to adapt it to varying conditions and uses.

Having thus fully described our invention,

what we claim as new and desire to secure by v Letters Patent, is: I

1. 'A new article of manufacture for use as a moistureproof package consisting of a nonhygroscopic transparent, flexible film adherent to metal under the application of heat, having uncovered areas and areas covered by metal foil integrated therewith whereby a package can be formed having transparent portions and metal foil covered portions. H

2. A new article of manufacture comprising a relatively strong non-hygroscopic transparent.

film that becomes adhesive under heat and that is metal adherent, and end coatings of metallic foil integrated therewith whereby a window is left between the metallic foil ends for the observation of the contents of the package and whereby upon folding, the ends of the fllm may be thermoplastically united with itself and adjacent areas of foil to form a moistureproof end seal for the package.

.3. A moistureproof package comprising an in ner transparent wrapper of thermoplastic nonhygroscoplc metal adherent synthetic resin having integrally secured to the outside thereof structurally weak metal foil extending to the ends of' the inner wrapper, the ends of said package being folded and sealed by thermoplastically uniting areas of said inner wrapper with adjacent areas of said metal foil.

4. A moistureproof package comprising an inner transparent wrapper of thermoplastic nonhygroscopic metal adherent synthetic resin having integrally secured to the outside thereof areas of structurally weak metal foil'separated to provide a window and extending substantially to the end of the inner wrapper, the ends of said pack- Y age being folded and sealed by thermoplastically uniting areas of said inner wrapper with adjacent areas of said metal foil.

HARVEY G. KIT'I'REDGE.

W. WILLIAMS. 

